Scans the "path" you provided for packages and writes an index with all
the available packages to "$path/packages.txt". If you'd like the index
to be written to a different file, provide the "to" argument.

Returns true on success and false on failure.

$bool = $cb->__create_custom_module_entries( [verbose => BOOL] )

Creates entries in the module tree based upon the files as returned
by "__list_custom_module_sources".